PureSee has shown a wider useful range of vision than Eyhance in direct clinical comparisons. But “more range” is not the same as “no reading glasses”. The useful question is whether that extra range helps with the tasks you care about—and what your surgeon expects with the planned result for your eyes.
Your screen and your book are two different questions
Your book and your screen are different visual tasks. Measure the distances you actually use. Illustration, not a simulation of vision with an IOL.
Eyhance is an enhanced monofocal lens: it adds some intermediate vision to the usual monofocal approach. PureSee extends the range further; this is called extended depth of focus, or EDOF. Neither description tells you exactly how comfortably you will read your own screen or book.
Start with the distances you actually use. A monitor across your desk is not the same task as small print held close to your face. Before the appointment, measure both. You do not need to learn an optical formula to explain what matters to you.
The background is in the Eyhance review and PureSee review. Here, the question is what happens when they are compared directly.
What did the direct comparison show?
A randomized study found better average vision with PureSee at both computer distance and reading distance. At about 66 cm, roughly 82% of tested PureSee eyes reached the study’s 20/32 reading-chart threshold, compared with 60% of Eyhance eyes. The average difference was about half a chart line.
That means more PureSee eyes reached a particular level in this test. It does not mean 82% of people could work comfortably without glasses. Researchers tested one eye at a time, with any remaining distance prescription corrected. They did not measure hours of comfortable computer work. Distance vision was similar, and measured contrast sensitivity was comparable. The study was funded by Johnson & Johnson. Corbett and colleagues, 2024.
Did people actually need fewer glasses?
Another study asked that more practical question. After three months, 9 of 25 PureSee patients reported needing glasses for everyday near tasks, such as reading a book, compared with 20 of 25 Eyhance patients. For intermediate tasks, such as using a computer, it was one person in each group. These were yes-or-no answers, not a test of reading speed or how long people could read comfortably.
There is a useful finding here—but also a detail worth noticing. The PureSee group ended up slightly more short-sighted on average. That can help near vision. Both groups had been planned for a small minus prescription, but the achieved results were not identical.
So the study supports a practical benefit worth discussing, not a promise that the lens design alone explains the whole difference. It was small and non-randomized; people with surgical complications were excluded. More PureSee patients reported daily-life discomfort from halos and glare, but the study did not establish a clear difference between the lenses. The authors reported government funding and no conflicts of interest. Kim and colleagues, 2025, including the supplementary questionnaire.
Being able to read is not the same as wanting to keep reading
Reading one message and spending an evening with a book are different expectations. Before you decide, tell your surgeon which one you mean by “reading without glasses”. Our explanation of comfortable reading explores that distinction.
The practical conclusion is straightforward: PureSee deserves consideration when additional range without glasses matters to you. Eyhance should not be dismissed simply because it belongs to a different lens category. Ask what each proposed plan is likely to give you at your own working and reading distances—not just which name sounds more advanced.
Three questions to take to your surgeon
- At my usual screen and reading distances, what would you expect with each lens—and where would I still need glasses?
- Are you planning the same distance focus for both options, or a small difference between my eyes? What would that change?
- Is there anything about my eyes that makes one plan more suitable, including my need to drive at night?
If you want to put your distances, priorities and the answers side by side, the IOL Decision Guide provides a structured workbook for your own comparison and questions. See inside the guide.
Watch Oleksii’s explanation
PureSee: a full review — in English, June 2025. The video explores range of vision and the importance of lens calculation. One clarification to its older wording: PureSee does not guarantee freedom from halos; the patient findings above are more precise about that.
This article explains the options; an eye examination and your surgeon’s assessment determine which are suitable for you.